10021565651 has 2 divisors, whose sum is σ = 10021565652. Its totient is φ = 10021565650.

The previous prime is 10021565639. The next prime is 10021565657. The reversal of 10021565651 is 15656512001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10021565651 - 2¹⁴ = 10021549267 is a prime.

It is not a weakly prime, because it can be changed into another prime (10021565657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010782825 + 5010782826.

It is an arithmetic number, because the mean of its divisors is an integer number (5010782826).

Almost surely, 2^10021565651 is an apocalyptic number.

10021565651 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021565651 is an equidigital number, since it uses as much as digits as its factorization.

10021565651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 10021565651 in words is "ten billion, twenty-one million, five hundred sixty-five thousand, six hundred fifty-one".